Attachment for sewing machines



Nov. 20, 1923. 1,474,422

A.'B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Oct. 4, 1917 6 Sheets-Sheet 1 Invent/0r:

Nov. 20 1923 1,474,422

A. B. MATTING LY ATTACHMENT FOR SEWING MACHINES Original; Filed Oct. 4, 1917 6 h ts-Sheet 2 4996 ix)? 52 r5 5.

Inventor:

Nov-.- 20, 1923. 1,474,422

. A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Oct. 4, 1917 6 SheetsSheet 5 Nov. 20, 1923 1,474,422

A. B. MATT-INGLY ATTACHMENT FOR SEWING MACHINES Original Filed Oct. 4, 1917 6 Sheets-Sheet 4 FE; EU.

. /0 Q U Inventor: /06

Nov. 20, 1923. I 1,474,422

A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Oct. 4, 1917 6 Sheets-Sheet 5 Nov. 20 1923 1,474,422

. A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Oct. 4. 1917 6 Sheets-Sheet 6 Fig. 55.

a 1/8 s'zu' Invenhr:

ltl

Ill!

Patented Nov. 20, 1923.

came stares ALBEETUS B. MATTINGLY, or New YORK, n. Y.

ATTACHMENT FOB snwrns Mieomnns.

Substitute for application Serial No. 194,714, filed. October 4, 1917. This application .filed January 21,

1/ ot/ll 'w 71 am a may concern Be it known that I, ALBERTUS B. MAT- TINGLY, a citizen of the United States, and resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Attachments for'Sewing Machines, of which the following is a specification.

This invention relates to an improvement in attachments for sewing machines, and the inventor is aware that the device is of a nature similar to that disclosed in British LettersPatent No. 17,153 of 1905, to Hills, and United States Patents No.412,081.to Fletcher, No. 146736, to Fletcher, No. 990,601, to Seward, and No. 990,610 to Turck and the object is to overcome some of the objectionable features of these devices and to further improve the same.

The principal objects are to provide a device of this character to automatically cut or slit the cloth just in advance of the stitching or binding of the button-hole so that the needle may pass alternately through the cloth and then through the slit or cut, thus causing the thread to be brought through the out and make a perfect binding of the raw edges of the work, and to provide a means for positively actuating the knife with a quick and decisive action at the proper periods to make the out the proper length ac cording to the length of the button-holes, and to have the length of cut automatically adjust itself with the adjusting of the device for the length of the button-hole.

The further objects are to provide a. device of this character which will provide a means for more evenly distributing the stitches around the contour of the bnttonhole than has heretofore been accomplished, and to provide a means whereby a more per feet adjustment of the cutting device as regards its alinement relative to the needle of the sewing machine is obtained.

The still further objects are to provide a device of this character which by its construction is considerably reduced in height and thereby doing away with the necessity of removing the face plate of the sewing machine to adjust the presser bar, and by the construction of the base plate obviating the necessity of removing the feed dogs of the sewing machine.

The still further objects are to provide an improved ratchet device for effecting the Serial No. 353,108.

lateral vibration of the work clamp, to produce the overstitch of the edge of the buttonhole, and to form other parts of the device by the stamping process, screw machines, which is the cheapest method of manufacturing devices of this class.

A still further object is to provide a 'device of this kind in which the knife can be adjusted to cut a line or slit in which the needle will follow by first penetrating the slit and then the material in itsvibrating motion on its forward movement and also perform the same function on tits backward movement in forming or stitching the button-hole.

lVith these and other objects in view, it will be seen that I accomplish the foregoing, by referring to the accompanying drawings forming a part of this specification; but I do not wish to confine myself to the exact construction shown, as I have, for the sake of clear illustration, exaggerated some of the parts, especially in the side elevations, and the cam faces of the yoke upon which the eccentric cam works.

In the accompanying drawings, showing one embodiment of my invention, Figure 1 1S 2. plan view of the'device; Fig. 2 is a similar view to Fig. .1, partly broken away to show the revolving disk and the cam for moving the work clamp; Fig. 3 is av similar view to Fig. 2 with the revolving disk removed; Fig. 4 is asimilar view to Fig. 3 and a section taken on line 4L- 1 of 5 is a side elevation; Fig.

view taken on the line 66 l 6 is a sectional t of Fig. 5; Fig. is a similarvlew to 6, with the knife and'its operating means removed; Fig. 8 is a similar view to Fig.7, with the work clamp removed showing the vibrating ,nieans; Fig, 9 is a similar view to Fig. 8, with the vibrating means removed; Fig. 10 is a central vertical sectional view; Fig. 11 is a perspective view of the operating lever; Fig. 12 is a (leta-il plan of the vibrator; Fig. 13 is an end elevation of the vibrator; Fig. 14: is a side elevation of the vibrator; Fig. 15 is a perspective View of the vibrator carrier; Fig. 1G is a plan of the supporting plate; Fig. 17 is a bottom plan of the revolving disk; Fig. 18 is a. central section of the revolving dis-k; Fig. 19 is a plan of the cam plate; Fig.20 is a side elevation of the cam plate; Fig. 21 is a plan of the knife carrier; Fig. 22 is a side elevation of the knife carrier; Fig. "23 is a lug. 0, Fig. l

plan of the knife shield and integral therewith the stripperplate for the needle and the and the pawl plate 14: by

guide for the work clamp; Fig. 24: is a side elevation of Fig. 23; Fig; 25 is a p an of the work clamp; Fig. 26 is a. plan of the ratchet cam; Fig. 27 is a section of the ratchet cam; Fig. 28 is a plan of the pawl plate of the vi brator; Fig. 29 is a plan of the spring pawl for operating the ratchet cam; Fig. 30 is a bottom plan of the cam member showing the cam for operating the knife and the race cam for controlling the work clamp; '31 is a plan of the upper portion of the assembling stud carrying the brake springs;-Fig. 32 is a,

3 side elevation of Fig. 31; Fig. 33 is a pla of the lower portion of the assembling stud and Fig. 34: is a side elevation of Fig. 33; Fig. 35 is a plan of the linkage for alining the work'clamp and knife with the needle; Fig. 36 is a diagrammatic view showing the movement of the work clamp and cam when the operating cam moves in a circular motion; Fig. 37 is a view similar to Fig. 36, but showing the cam moving in an elliptical path.

I provide a. suitable base plate 1, which is secured to a rearthroat plate 2 of the sewing machine in any suitable manner, but preferably screwed thereto, as shown in Fig. 1 of the drawings.

The base plate 1 is provided with an ear 3, which is upwardly turned and carries the operating lever 4, which rocks on a pivot 5 formed of a large screw, the lever 4 being provided with a bifurcated end (5. which engages the shank of the screw of the tightening collar of the needle bar of the sewing machine. The lever 4c is further provided withan. arc-shaped slot 7, through which passes the arm of the friction clutch, Wl'ilClliGffGlVGS its movement from the screw 8 in the ear 9' and the rear end 10 of the slot '7. The screw 8 is frictionally held from turning by the pressure of the spring 11 against its head and the ear 9. The lever l further provided with an arm or downward extension which has a bifurcated end 1.2 which operates the pawl 13 the lever 15 which the bifurcated end 12 embraces, and which mounted on the throat plate 2 by means of a body screw forming a pivot 16. In the forward end of the lever 15 a pin 17 (see Figs. 9, 28 and 29) which operates the pawl 13 and the pawl plate 14 through the slots 18 and 1.9.

The base plate 1 is further provided with a pivot or stud 20 made up of two parts 21 and 22. stud is hollow and has its upper and lower ends turned down. leaving a bodv portion 23 which is slotted on opposite sides forming grooves 24 for the reception of the extensions 25 of the part 22, and a washer 26 is forced on to the lower part of the The lower portion 21 of the.

1 art 21. The washer 26 forms a substantial base for holding the stud in a vertical position on the base plate, which is done by the screw 27 passing through the washer and thebase plate 1 and the hollow part 21 and being screwed into the part 22, which locks all of the several parts assembled on the stud in position byitshead 28, in'which are secured two springs 29 which act as friction brakes in connection with the cam InemberBO, which is driven by a friction device (see Figs. 1 and 10) composed of a friction ring 31 supported by a flange 32 on the cam member in the recess 33 of the ring is pivoted a friction dog 34, which is normally held in contact with cam member 30 by a spring 35. The lever 36 of the dog passes through an opening or slot 7 in the operating lever 4 and operated by the screw and the rear end of the slot 7, the screw 8 forcing the dog and ring backwards and relieving the pressure on the cam member. The springs 29 bearing against the surface 37 prevent the cam member from turning, and the rear end of the slot forces the dog forward and on the reverse movement of the lever =1 causes the nose 38 to bite or grip the surface 39 of the cam member 30 and revolve the same a predetermined amount, which is regulated by the screw 8. The plate 40 fixed on the upper face of cam member 30 keeps the ring in )osition.

otatably mounted upon the stud 20 and supported by the washer 26 are the pawl 13 and the pawl plate 14L (which are swung in an are by the end 12 of the lever a through the lever 15 and its pin 17,- in a forward and backward movement). Rot-atably mounted upon the stud 20 and resting upon the pawl plate 14: is a'ratchet cam l1, which receives a step by step rotary movement from the upturned end 138 of the pawl 13 extending through a slot in the plate 1 1, and engaging in turn the notches .37 of the ratchet'cam 41, and which operates the vibrator 56, which has its support on the pawl. plate and is pivoted on th'ep in- 51 of the L-shaped member 52. I

The base plate 1 is further provided with a'cutaway portion %3 in which is located a linked member let having a slot 15 and a. circular opening l6 which fits the head of the screw 27 which acts as a pivot. Secured to the forward end of the linked member 44 by a pivot is a link 17 with an upturned end 48, which is tapped for the screw 49 which passes through ahole in the ear 3 and is provided with a lock nut 50. By turning the screw 49 to pull or push the link 47, the slot can be made to line up perfectly with the needle and the stud 20 andheld in this position by the lock nut 50. The slot 15 is for receiving the bottom end of the pin 51 of the L-shaped member 52, which is provided with a slot 53 for adjusting it upon the base plate 1 by the screw 5 1, and it is provided with an upturned ear 55 for adjusting it while the screw 5% is loose. The pin 51 is tight in the member 52 and its upper end forms a pivot for the vibrator 56, which is connected thereto by the hole 57 in the ear 58, and when assembled the car 58 is capable of passing under the pawl 13 and pawl plate 1 1, while the yoke .59 straddles the ratchet cam and rests upon the pawl plate The vibrator 56 is provided with a pivoted block 60 which fits the inner faces of the rear yoke 62 of the work clamp 63, which straddles the stud and rests on the supporting plate 61. which, working in con- 'unction with the cam member keeas the forward part 64 of the work clamp in proper contact with the base plate 1 and prevents the bottom stripper plate 65 from leaving the slotted way 66 in the base as it is oscillated by the work clamp in connection with the ears 67.

The supporting plate 61 is held in position by resting on the shoulders 68 of the bottom part 21 of the stud 20, which tits the hole 69 provided with slots through which pass the extensions 25 of the upper part 22 of the stud 20 and prevent plate 61 from turning and causing the springs 29 to act as friction brakes on the cam member 30. The screw 27 pulling down on the part 22 pinches the 1 plate 61 between the shoulder 68 and the part 70 of the upper part 22 of the stud.

Mounted upon the yoke 62 is the guide or shield 71 for the knife carrier 72, having its front end 73 in the form of a stripping plate which slides in a groove or space 741 formed by a. plate 7 5, which is forced into the upper jaw 76 of the w rkclamp. The,

rear end of the shield 71 is enlarged, forming a guide 7 7, by means of the downwardly extending flanges 78 fitting the yoke 62, which moves back and forth relatively to the stud 20. The rectangular opening 79 is of a width equal to the diameter of the upper part 22 of the stud 20, which passes through it and prevents the shield from moving back and fort-h butallows its rear end to be drawn laterally of the stud 20 in both directions by the pin 80 working in the cam grooi e 81 formed by the cam surfaces 82 and 88 on the under side of the cam member 30 (thus causing the vibrator to vibrate or oscillate the work clamp in the contour of abuttonhole while the revolving disk is moving the work clamp back and forth the length of the buttonhole).

Mounted upon the guide or shield 77 is the knife carrier 72, which has its spring portion 8+1- passing through the openings 85 and 86 of the shield. 84- has its outer end bent upward, with two The spring portion ears 87 forming a pair of aws for the knife 88, which is lie'ldby a pin or screw 89. The rear end of the spring portion 84 is formed in a rectangular frame or yoke 90 having a flange 91 forming a cam face 92 against which the cam 93 secured to the cam member 30 works, and the flexible portion 94 insures the keeping of the cam 93 and the cam face 92 always in contact. At a predetermined point the flange 91 forming the cam face 92 of the yoke causes the yoke and knife to move quickly back between the strokes of the needle and thus prevent the needle bar from striking the knife several times while it is being moved back from under the needle bar. This quick movement is caused by the cam 93, which holds the knife forward for the proper time, having an abrupt drop 97 so that while it is: revolving on the stud 20 the point 98 passes the point 011 the cam 92. The point 98 is so formed as to not interfere with the point 95, and this allows the carrier 72 to move back its full stroke at this point, which is accomplished on one of the upward strokes of the needle bar.

Mounted on the top of the stud 20 and fixedly held in place by dowel pins 99 is a cam plate 100, which works in conjunction with the driving plate 101 that is secured to the cam member 30 and which causes the revolving disk 102 to revolve in the path of an ellipse relative to the stud 20 and having its major axis in line with the work clamp and its minor axis transverse therewith and the intersection of its axes to the rear of the stud 20. The revolving of the disk in an elliptical path is caused by its pivot pm 103 shifting its position in the slot 104 as it revolves. The. shifting of the pin is caused by the pivoted cam 105 sliding in the shallow slot 106. It will be noted that the slot 104; is deeper than the slot 106 this is to prevent the pin 103 from entering the "slot 106 at the critical point when the disk 102 is'being the starting position of the driving plate for I each cycle. To make a button-hole, with the driving plate in the position indicated in dotted lines 109, the cam 107 will be at 110 and the pivot pin 103 at 111 and block 105 at 112. hen the driving plate reaches the position indicated at 113 the earn 107 will he at 11a and its center will represent the end of the minor radius of the ellipse and the- While the driving plate is moving to the position shown in full lines the pivot pin 103 moves along the slot 10s to 116 and the cam 105 return to the center of the cam plate. and as the driving-plate continues its circular movement to the position 109 the cam 105 moves over to 117 and'back to the center of cam plate. Mounted upon the revolving disk is an adjustable cam 118 held in position by a stud 119 having a rectangular head 120 which fits the recess 121 and which guide-s it in its movement. The stud passes through a slot 122 and the cam into a screw cap 123, which causes the block 118 to bind against the disk 10 This cam moves in an elliptical path, and the lengths of the axes are charmed by the adjustment of the cam on the disk 102 relative to the pin 103. The cam 118 performs the function of the eccentric cam of the patents mentioned in this specification and produces a more satisfactory result.

The cam 118 moves the work clamp forward and back from the stud 20 and in line with the needle through the yoke member 12-1, which is secured to the work clamp and provided with a slot 125 in which the cam 118 is located, and as the cam revolves it works against the face 126 first to drive the clamp forward and against the face 127 to draw the clamp back. The yoke member 12 1 is secured to the work clamp 63 by means of screws 12S and the forward end is bifurcated and bent so as to form bearings for the locking member 129, which is formed of a bent wire having a central portion 180 which acts in the capacity of a hand lever to operate the two end portions 131 which act upon the spring extensions 132 of the upper jaw 63 and which are riveted to the rear yoke 62 of the work clamp.

hilouuted on the underside of the base alate 1 (see Figs. 8 and 9) is a spring member which is held in position by the rivets 13a and has an upwardly extending portion 135 which extends through the opening 136 of the prwl plate 14: and into the holes 137 of the ratchet cam $1. This prevents the ratchet cam from being turned backwards by frictionof the end 138 of the pawl slipping out of any one of the holes 137 upon its backward movement after it has revolved the ratchet cam one-tenth of v a turn.

The base plate is further bent or formed so as to have a raised portion 139 through the center thereof, upon which the bottom of the work clamp slides and on which is cut the channel or groove 66 for the stripper plate 65, which has an opening 140 somewnat in the shape of a T. Beneath the stripper plate in the base plate is an open.- ing L11 to allow the needle to perfornrits functions. The raised portion 139 formsa channel or groove 142 (see Fig. 10), which allows the free action of the feed dogs of the sewing machine and raises the device enough to permit the cutting of the cloth without the knife hitting the dogs on its. downward stroke.

The operation of the device is very simple. The rear throat plate of the sewing machine is removed andthe device is slipped in its place by the insertion of the throat plate 2 which is screwed to the device, and the shank of the screw which holds the needle in position passes into the bifurcated end (i of the lever 4-. When the attachment is first put on the machine the screw 51 and lock nut 50 are loosened and the screw 49 turned to bring the knife in line with the needle. The lock nut 50 is then tightened up. This holds the slot 15 in a perfect line with the needle and then the number 52 can be adjusted for any width of vibration for the work clamp. The screw 5a is then tightened and the attachment is ready for operation. It will be understood that after the knife has been once adjusted for the needle the attachment can be removed if desired and put back without the knife being readjusted, and the vibrating movement of the work clamp can be changed to take more or less bite by tightening or loosening the thread, tension of the sewing machine when the attachment is adjusted to make a larger or smaller button-hole, without disturbing the adjustment of the knife. 0

To make a button-hole, the work clamp is set by operating the sewing machine until the extreme back position is reached. The lever 130 of the locking member 129 is then pressed forward, (that is, in the direction of the needle), and forces the ends 131 backwards and thus relieves the pressure of the springs 132, which allows the jaws of the work clamp to open. The cloth is inserted between the jaws and the level.- 130 pushed back to its original g aosition, thus causing the upper jaw to force the cloth down into the concave opening in the lower j aw. and at the same time the flanges of the upper jaw prevent the slipping of the cloth on the lower aw and thus causes the cloth to .be stretched like a drum head.

lVith the work clamp in said position the to move swiftly back and, drawthe knife out of line with the needle bar before it has time to degcend and strike it again, (as shown in full lines. in Fig. 5), thus preventing further cutting, and the knife remains in this position, until the button-hole is finished.

The stud 20 is the pivot center upon which the work clamp is oscillated by the vibrator 56. With each upward movement of the needle bar the lever 4 is raised, which in turn swings the pawl plate 14- sufficiently to have the pawl 138 act on one of the holes 137 of the ratchet cam and revolve it onetenth of a revolution, which causes one of thepointed cam faces 1&3 to act on one side of the yoke 59 and cause the vibrator to swing to one side on its pivot 51. The face 144: prevents any overthrow of the vibrator. The next stroke of the needle causes one of the faces 143 to act on the opposite side, of the yoke 59, and swing it in the opposite direction. This movement of the vibrator causes the work clamp to be oscillated on its pivot 20, such motion being transmitted through the block of the vibrator. While the vibrator oscillating the work clamp in one direction or the other with every stroke of theneedlev to make the needle pass first through the cloth and then through the cut, the elliptical cam is slowly shoving the work clamp forward the length of the button-hole, the speed of the forward movement being regulated by the screw 8, which strikes the arm or lever 36 of the friction clutch and forces the ring 31 back a predetermined amount, (upon the downward stroke of the needle). The rear end 10 of the slot 7, upon reachingthe arm 36, (on the ugward movement of the needle) forces the ring to move forward and the nose 38 to bite into the cam member 30 and cause it and the revolving disk to revolve which causes the cam 1.18 to act upon the face 126 of the yoke member 12st and shove the work clamp forward. and when the cam, on the last half of the revolution. of the revolving disk, works against the face 127 it causes the work clamp to be drawn backwards. The revolving of the cam member 30 causes the pin to shift its position while the utton -hole is being made. This is due to the pin 80 being held relative to the stud 20 by the groove 81 and in the start is in the portion 145 which forms a part of the, backend of the button-hole. that is, the partwhich is furthest fronitheedge of the gar? ment. The part llfi holds the pin in a position so that the vibratorwill vibrate the work clamp up oneside of the slit which is being made by the knifefor thejbutton-hole. The part 11-? then causes the pin 80 to move-v nearer to the stud E20, and'this causes the first part of the loop or eyelet to be made, ndhe par au es the pin 80. to mo e the farthest away from the stud, and this causes the semi-circular end of the eyelet to be made. The part 14-9 causes the pin 80 to move near to the stud, and this causes the completion of the eyelet. The pin is then held in position by the part 100 until the vibrating of the work clamp down the other side of the slit completes the buttonhole by the pin going to its original position in the portion 145. This operation forms what is known by the trade as the eyelet or looped button-hole It will be noted that the cam member 30 revolves an equal distance at each stroke of the needle, and if the cam 118 were attached directly to the cam u'ien'iber the cam 118 would move in a circle and would pile up too many stitches atthe end and make a defective button-hole but by having the cam move in an elliptical path this is obviated. Of course it is desirable to have the stitches a little closer at the back end than, on the side, but not to the extent which would be produced if the circular movement were used.

By referring to the diagrammatic 36 and 37, it will be seen more clearly the advantages gained by the cam 118 moving in the elliptical path instead of the circular path. In these two views I have indicated by thev dotted lines 150 the movement; of the cam member 30 for every ten strokes ofthe needle or for every ten stitches, and the point where each dotted line 150 touches the semi-circle 151 indicates where the cam 118 would be; for instance, after the first ten stitches it would have moved from a to l) and the second ten stitches from Z), to c and so on until after a hundred and twenty stitches it would be at m and the first half of the button-hole would be finished, and the reverse movement would under the same condition, while the cam 118 is completing the circle, complete the button-hole. The vertical lines 152 represent the foiavard movement of the cam 118 and the horizontal lines 153 the work clamp, and the vertical lines 15% represent. the forward movement of the work clamp. It will be noted that, all of the lines 153. are cxactlythe same length in both figures, and when the cam 118 moves from a to Z2 ten stitches are crowded in o the space between it and o, and when it moves from b to c ten are made in the spa e fr m 0 to 2 and on, n as the. am 1.18 mo es fr m a to g e c of; t e spaces .5 from a w t inc ease n l ngth and. h sit w ll b s en hat entirely tee m ny stitches r cro int t e space ironi to Q and o 2?, h le from 22 to 9 he s it hes w uld e normal and q to 1? would n t have uflie e t s tch a r to s a d s o t en irely o e and h exact re erse c id tlen would exist while the earn 118- is mo ing from g to m and the clamp from t to- 2. Thus it will b seen hat the circular move-- ment gives a verynneven stitching of the button-hole, by piling up too many stitches at the back end and entirely too few at the eyelet end, as the distance of travel or space is greatly increased by the curvature of the eyelet. It will be noted that the work clamp needs to be retarded at theeyelet end in order to allow more stitches to be made while the eyelet is being formed, and I accomplish this by having the cam 118 move in an elliptical path and by having the minor axis of the ellipse to the rear of the center of the stud :20, as will be seen by referring to Figs.

3. 19 and 37. It will be noted that the cam 118 follows an elliptical path, indicated by the line 156, and when the cam member moves from a to b the cam 118 moves from a to b, and when the cam member has moved to 0 the cam has moved to 0, and so on, and the clamp has moved from n to 0' while the cam member has moved from a to b and the cam from a to b, and so on. It will be noted that the spaces n0 are suitable for the back end and the space 0p is almostnormal and the spaces pg and g-r' are normal, and the spaces rs to g 2 are gradually shortened in order to compensate for-the increased travel or lengthened space to be stitched while the eyelet is being formed, and the work clamp at this point is moving in a line forming a tompound curve instead of a straight line, and the retarding of forward movement allows the sewing machine to supply sufficient stitches to mak the eyelet have the proper number of stitches to compare with the sides of the button-hole. It is understood that the formation of the other side of the button-hole is the exact reverse of'the movements shown in the diagrams and that the diagram in Fig. 37 shows the movement of the work clamp relative to the needle and the stud of the attach.- ment, it being understood that the back end of the button-hole is the beginning of the operation and also the ending of the operation and that the back end is made while the work clamp is moving forward from n to 0' and the sides from 0' to If and the eyelet end V from t to 2, or in other words, in the operation of making the button-hole the work on the button-hole is always in the reverse direction to the movement of the work clamp. It will be understood that I have stated for convenience of illustration that ten-stitches are made between each of these divisions but by regulating the screw 8 any number of stitches can be made between the divisions; and from the foregoing it will be clearly seen that the elliptical movement places the stitches very evenly along the sides of the button-hole and'does not over crowd the ends too much, as the space between 47/ and 0 is greater than between a and 0.

I claim as my invention: 1.111 an attachment for making eyelet button-holes, the combination of stitching mechanism including a needle, meansfor cutting a button-hole in advance of the stitching, a work clamp, means for vibrating the clamp along each side of the work as incised, means for shifting the work 2111 an attachment of the character stated, the combination of stitching mechanism inducing a needle, a work clamp, a stud, a, cam member having a driving plate rotatable therewith, a camming plate provided with slots in line with the major and minor axes of an ellipse and their intersection to the rear of the said stud mounted upon the stud working in conjunction with the driving plate, a disk operable by the driving plate, the disk being provided with a pin and a cam block operating in the aforesaid slots of the camming plate to move in an elliptical path with'respect to the stud having its major axis in line with the work clamp and its minor axis disposed transversely thereto, the intersection of its being disposed to the rear of the stud, means for slitting an eyelet button-hole in advance of the stitching thereof, and a cam connected with said work clamp and operable by said disk for movement in an elliptical pathfor reciprocating the work clamp.

An attachment as described in claim :2 characterized by means for vibrating the work clamp to follow the eyelet button-hole incision.

4. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vial-ate laterally, of a stud, a ratchet cam mounted on the stud and having a cen tral perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp; relatively to its pivot-to form a'button-hole' with an eyelet end, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

in an attachment of the character stated. the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the pe riphery of the cam having live faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole with an eyelet end, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

6. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, aratchet cam mounted on the stud and having central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meet-- ing to form five points, advancing moans arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole with an eyelet end, means for increasing or decreasing the overstitch or the lateral throw of the work clamp, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth wit-h respect to the stitching mechanism.

7. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforat ons in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the workclanip and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a buttonhole with an eyelet end, means for adjusting the vibrator relative to the stud and needle, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

In an; attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate there- 'on and to vibrate laterally, of astud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five point-s, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form -a button-hole with an eyelet end, means for adjusting the vibrator relative to the stud and needle, means for regulating the length of the button-hole, and means capableof travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

9. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work. clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work,

clamp relatively to its pivot to form a but ton-hole with an eyelet end, and means capable of travel in an elliptical path connected with the Work clamp for moving the same back and forth with respect to the stitching mechanism.

10. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate later-ally, of a stud, a ratchet cam mounted on the stud and having a central. perforation. and tenperforations in a circular series around the center, the periphery of'the cam having five faces meeting to form five points a pawl plate on said stud arranged to engage. the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole with an eyelet end, and means capable of travel inan elliptical path connected with the work clamp for moving the same back and forth with re sp-ect to the stitching mechanism.

throw of the perforated earn,

ll. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet ca rn mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphcry of the cam having five faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form abutton-hole with an eyelet end, means for increasing or decreasing the overstitch or the lateral throw of the work clamp, and means capab-le of travel in an elliptical path connected with the work clamp for moving'the same back and forth wit-h respect to the stitching mechanism.

12. In an attachment of the character stated, the combination with-a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a. ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphcry of the cam having five faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole with an eyelet end, means for adjusting the vibrator relative to the stud and needle, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism. V

13. In an attachment of the character stated, the combination with a frame-and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a. central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meet ing to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot toform a button-hole with an eyelet end, means for ad;-

preventing any backward V 1 amaze justing the vibrator relative to the stud and needle, means for regulating the length of the button-hole, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism.

M. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole with an eyelet end, and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism adjustable for regu lating the length of the buttonhole.

15. In an attachment of the character stated, the-combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn. the cam step by step, a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole with an eyelet end, and means capable of travel in an, elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism ad'- justable for regulating the length of the button-hole.

16.111 an alt clnnent of the characterstated, the combination with a frame and a work clamp mounted to reciprocatethereon and to vibrate laterally, of a stud, ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforae tions to turn the cam step by step. a vibrator connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot to form a button-hole 'ith an eyelet end, means for increasing or rilecreasing the overstitch or the lateral throw of the work clam and means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism adjustable for regulating the length of the button-hole.

17. In an attachment of the character stated, the combination of a stitching mechanism including a needle, a work clamp, a

stud, a cam, a revolving disk with a pivot pin, a cam member having a driving plate rotatable therewith, the said cam adjustable on the said revolving disk, a camming plate provided with slots in line with the major and minor axes 01 an ellipse and their intersection to the rear of the said stud, saidvcamming plate mounted upon the stud and working in conjunction with the driving plate and the revolving disk operable by the driving plate, the disk being provided with a pivot pin and a cam block operating in the aforesaid slots of the cam plate to cause the disk to revolve in an elliptical path with respect to the stud and having its major axis in line with the work clamp and its minor axis disposed transversely thereto, the intersection of its axes being disposed to the rear of the stud, means for slitting an eyelet button-hole in advance of the stitching thereof, and the said cam connected with the work clamp and operable by said disk for movement in an elliptical path for reciprocating the work clamp.

18. In an attachment of the character stated, the combination of a stitching mechanism including a needle, a work clamp, a stud, a cam member having a driving plate rotatable therewith, a cam plate provided with slots in line with the major and minor axes of an ellipse and their intersection to the rear of said stud, said cam plate mounted upon the stud and working in conjunction with the driving plate, a disk operable by the driving plate, the disk being provided with a pin and a cam. block operating in the aforesaid slots of the cam plate to cause the disk to move in an elliptical path with respect to the stud having its major axis in line with the work clamp and its minor axis disposed transversely thereto, the intersection of its axes being disposed to the rear of the stud, means for slitting an eyelet button-hole in advance of the stitching thereof, and a cam connected with said work clamp and operable by said disk for movement in an elliptical path for reciprocating the work clamp.

Signed at New York in the county of New York and State of New York this 31st day of December, A. D. 1919'.

ALBERTUS B. MATTINGLY. 

